Fee, fie, fo, fum!
/EndJoke
My models (for the most part) need to pass what I call the "Footman Test" where I set up the model next to a footman. If it looks too HD or too simplistic in an area, I adjust it to be more akin to the detail of Blizzard's footman, this includes scaling of certain things like the helmet, feet, and shield size.
My natural theme tends to revolve around the humans in "The Hobbit" (2003)
Though without quite as large a head.
So basically, big hands/gauntlets, big feet/boots, big helmet, big sword & shield, normal frame body.